Feeding device for the workpiece on planing machines



Nov. 27, 1956 F. w. H. AMBELANG 2,771,920

FEEDING DEVXCE FOR THE WORKPIECE 0N PLANING MACHINES Filed April 25,1955 1:762 ELECTRQMAGNET ii 3 6 I ELECTROMAGIVET F WH- Ambelang ATTYSUnited States Patent FEEDING DEVICE FOR THE WORKPIECE 0N PLANINGMACHINES Friedrich Wilhelm Hermann Ambelang, Flensburg, GermanyApplication April 25, 1955, Serial No. 503,618

Claims. (Cl. 144-114) It is known in connection with planing machines tofit in front of the cutter spindle a device by which the workpiece isheld between rollers provided with chamfers. This device can certainlyprevent thin workpieces from pulsating over the cutter spindle at thecommencement of the feed, it is, however, not suitable for preventingtimber resting concave on the horizontal planing table from altering itsposition relatively thereto during the feed, and it cannot influence thedirection of the workpiece running through.

The invention relates to a feeding device for workpieces on planingmachines. This feeding device has at least one straight guiding surfacefor resting on a table plate of the planing machine and in the case of aplaning machine working on two sides, a straight guide surface on eachside for resting one against an upright side and the other against aflat side of the table plate and which is provided with teeth, known perse, for engaging in the rear end of the workpiece. Thus reliable guidingof the workpiece during the feed is obtained in a simple manner with theaid of the device, preventing twisting and rocking movements and, assoon as it comes near the cutter spindle, the feeding device can beeasily detached from the workpiece by withdrawal.

Another feature of the invention in the construction of the feedingdevice for planing machines working two sides in combination withmagnetic adhesion, known per se, consists in that the feeding deviceacts by magnetic adhesion simultaneously on two of its guiding surfaces,namely on the guiding surface facing the flat side and that facing theupright side of the table plate.

Finally the feeding device has a handle which is constructed as a buffercooperating with an abutment provided for limiting the feed of thedevice.

A preferred embodiment of the invention is illustrated by way of examplein the accompanying drawing, in which Fig. 1 is a side elevation, and

Fig. 2 a top plan view of a feeding device on the table top of a planingmachine;

Fig. 3 shows the feeding device alone in side elevation;

Fig. 4 is a top plan view, and

Fig. 5 an end view thereof.

The feeding device 1 consists substantially of a body slidably arrangedon a table plate 8 of a feed table of a planing machine: On the sidefacing the flat side of the table plate 8 the feeding device 1 has astraight guiding surface 13 bearing against the table plate and on itsside facing the upright side 9 of the table plate 8 another straightguiding surface 14 bearing against this upright side 9. At its front endthe feeding device 1 is provided with sharp teeth 2, points, pins or thelike, which as the feeding device is moved forward against a woodenworkpiece to be fed for the purpose of working, force their 2,771,920Patented Nov. 27, 1956 "ice way into the rear end face of the workpieceafter which the position of the workpiece is dependent upon the guidingof the feeding device. During the feed movement, during which thefeeding device is moved by the hand holding a handle 15 or can be movedby known mechanical arrangements, and is steadily presed with itsguiding surfaces 13, 14 against the flat side and the upright side ofthe table plate respectively, the workpiece 10 is simultaneously workedon two sides by a horizontal cutter spindle 11 and a vertical cutterspindle 12. The feed of the workpiece 10 by the feeding device 1 iscarried out to within a short distance in front of the horizontal cutterspindle 11 where a buffer 3 provided on the handle 15 of the feedingdevice and which may be made of rubber, comes into contact with a stopor abutment 5 provided for limiting the feed. By withdrawal the feedingdevice I can easily be detached from the workpiece 10 at this point,after which the workpiece covers the short remainder of its travel alonebeing guided by hand or by a mechanical drive. The reliable bearing ofthe guiding surfaces 13, 14 of the feeding device 1 is ensured by theprovision of electromagnets 6 and 7, of which the magnet 6 facing theflat side and the magnet 7 facing the upright side 9 of the table plate8 are simultaneously efiective. Known permanent magnets might also beprovided instead of electromagnets.

From the above detailed description of the invention it is believed thatthe construction will at once be ap parent, and while there is hereinshown and described a preferred embodiment of the invention, it isnevertheles: to be understood that minor changes may be made thereinwithout departing from the spirit and scope of the invention as claimed.

1 claim:

1. A feeding device for workpieces on planing machines comprising incombination with a table providet with a planar surface located in oneplane and anothe1 planar surface located in a second plane substantial!)transverse to said first mentioned plane, a first guiding surfacebearing against the first mentioned surface of salt table and a secondguiding surface bearing against tht second mentioned surface of saidtable, teeth means pro vided on the front face of said device forengaging tht rear portion of the workpiece, stop means on said table anda handle on said device provided with buffer mean: for engaging saidstop means so as to limit the feedin; stroke of said device.

2. The combination as set forth in claim 1 includim electromagneticmeans on said device for maintainin continuous contact between saidtable surfaces and sait device during the feeding of a workpiece alongsaid tablt surfaces.

3. The combination as set forth in claim 2, wherein said electromagneticmeans comprises two magnets dis posed at an angle to each other andcooperating respec tively with the two angularly disposed surfaces onsalt table.

4. In combination with a table for planing machine comprised of twoangularly disposed guiding surface extending in the same direction, afeeding device, sail feeding device including two angularly disposedguidin; surfaces in alignment with and cooperation with the re spectiveguiding surfaces on said table, and electromag netic means on saidfeeding device for insuring con tinuous contact between said tablesurfaces and sai feeding device during the feeding of a workpiece alonsaid table surfaces.

5. The combination as set forth in claim 4, wherei id electromagneticmeans comprises two electromag- :tsdisp0scdlat an angle to each otherand respectively loperating with the two angularly disposed surfaces 00.id table.

References Cited in the file of this patent UNITED STATES PATENTS686,339 Ritchie Nov. 12, 1901 4 Pedron Apr. 1, 1952 Gecmen Apr. 27, 1954Pence Feb. 1, 1955 Yelle Feb. 22, 1955 FOREIGN PATENTS France June 9,1906

